Just had this happen in one of the new Grineer galleon (vs Infested) Disruption missions. Early on into the match (round 2 or 3 ish) it kicked in. Warframe abilities unusable, unable to use Transferrence, and - fascinatingly enough - I couldn't use melee attacks (not even airborne-ground slams worked). Managed to blast my way to round 9 with guns only.
Lobbed myself into numerous pits, but it didn't reset. When it happens during Eidolon hunts, I usually either jump into water, or mount-then-dismount either Archwing or K-Drive. If one doesn't work, the other usually does. Dying is a last resort, but that's risky, given the prevalence of the issue, and the limited number of respawns.
Trying /unstuck has never fixed this issue. I think we need a new sort of "force respawn" command - just completely reset our Warframe's state (with the obvious exceptions of health, shields, energy and ammo).